README.md in symbolize-4.5.0 vs README.md in symbolize-4.5.1

@@ -54,10 +54,10 @@
       symbolize :kind, :in => [:im, :mobile, :email], :scopes => true
 
 
 Other examples:
 
-    symbolize :so, :in => {
+    symbolize :os, :in => {
         :linux   => "Linux",
         :mac     => "Mac OS X"
     }, :scopes => true
 
     # Allow blank